The Stone Head of the Evil King had excellent features, and the color made it look like stone. I'm surprised to see it still on the list, so I will remove it now.
1x01 - Blackbeard's Treasure Map
1x02 - The Golden Cup of Belshazzar
1x03 - Galileo's Cannonball
1x04 - Wild Bill Hickok and the Dead Man's Hand
1x05 - John Henry's Lost Hammer
1x08 - John Sutter and the Map to the Lost Gold Mine
1x09 - The Star of Sultan Saladin
1x10 - The Keys to the Alhambra
1x11 - The Helmet of Genghis Khan
1x12 - The Trojan Horseshoe
1x13 - The Pendant of Kamehameha
1x14 - The Lost Logbooks of Magellan
1x15 - The Moccasins of Geronimo
1x16 - Henry VIII's Great Seal
1x17 - The Lucky Pig of Amelia Earhart
1x18 - Ponce de Leon and the Lost Fountain of Youth
1x19 - The Treasure Map of Jean Lafitte
1x20 - The Oracle Bowl of Delphi
1x21 - The Paintbrush of Leonardo da Vinci
1x22 - The Golden Chains of Zenobia
1x24 - The Stolen Arm of Shiva
1x26 - The Helmet of Joan of Arc
1x27 - The Medal of Sir Edmund Hillary
1x30 - The Silver Saddle Horn of Hannibal
1x31 - Alexander and the Gordian Knot
1x34 - The Codebook of Mata Hari
1x35 - Pecos Bill's Lost Lariat
1x36 - Robin Hood and Marian's Ladder
1x37 - Lawrence of Arabia's Headdress
1x38 - The Collar of Davy Crockett
2x01 - The Silver Horseshoe of Butch Cassidy
2x02 - The Secret Battle Plan of Nathan Hale
2x03 - The Golden Stallion of Ali Baba
2x04 - The Silver Cannonball of Grandy Nanny
2x05 - The Walking Stick of Harriet Tubman
2x06 - The Lost Love Letter of Captain John Smith
2x07 - The Diary of Dr. Livingstone
2x08 - The Bone Necklace of the Blackfeet Chief
2x09 - The Mush Pot Hat of Johnny Appleseed
2x10 - The Cracked Crown of the Spanish King
2x11 - The Imperial Purple Robe of Empress Theodora
2x13 - The Lucky Medallion of Atocha
2x23 - The Jeweled Necklace of Montezuma
2x25 - The Shriveled Hand of Efoua
2x27 - The Crown of Queen Nzinga
2x31 - The Leopard-Skin Cloak of Annie Oakley
2x33 - The Golden Pepperoni of Catherine de Medici
2x35 - The Milk Bucket of Freydis
2x36 - The Missing Weather Maps of Charles Lindbergh
2x37 - The Levitating Dog Leash of Nostradamus
2x39 - The Bonnet of Dolley Madison
3x01 - The Bifocal Monocle of One-Eyed Jack
3x06 - The Lion-Slashed Jacket of Sacagawea
3x09 - The Snow Cone of Mt. Kilimanjaro
3x17 - The Discarded Seal of Ivan the Terrible
3x18 - The Mysterious Manuscript of Mary Shelley
3x19 - The Dried Apple Half of William Tell
3x24 - The Enormous Feather of the Me Linh
3x27 - The Lily-Crested Crown of Clovis I
3x30 - The Mummified Hand of the Egyptian King
3x33 - The Pearl Necklace of Gwalior
3x35 - The Lost Whale Bone of Pytheas
3x36 - The Dried Ear of Corn of Sojourner Truth